So I have been really bored & the better coverage of the Olympics isn't until tonight so I decided to do some number crunching. Obviously there are lots of GLO's I missed but I did these few as a way to get started.
If I made a mistake on your particular GLO's #'s, I apologize. Just let me know & I'll correct my mistake. Most of the info I found was on threads for the particular GLO's.
SIGMA KAPPA
196 Chapters
105 Active Chapters
53% of our total chapters are still up & running
Oldest existing ACTIVE chapter is Delta chapter (1904) at Boston University
Newest chapter is Kappa Lambda (2004) at North Georgia College & State University
DELTA GAMMA
186 Chapters
145 Active Chapters
84% of total chapters up & running 
Oldest existing ACTIVE chapter is Eta chapter (1879) at University of Akron in Ohio
Newest chapter is Theta Beta (2004)
DELTA DELTA DELTA
177 Chapters
145 Active Chapters
71% total chapters still going strong
Oldest existing ACTIVE chapter is Alpha (1888 but recolonized in 1984) at Boston University
Newest is Epsilon Alpha (2003) at Florida Gulf Coast. However, there are Epsilon Beta, Epsilon Gamma, Epsilon Delta, & Epsilon Epsilon colonies.
DELTA ZETA
278 Chapters
162 Active Chapters
58% of total chapters still here today
Oldest existing ACTIVE Chapter is Alpha (1902) at Miami University of Ohio
Newest is Pi Gamma at Cal State U of Northridge
KAPPA KAPPA GAMMA
151 Chapters
130 Active Chapters
86% of total chapters still here today
Oldest existing ACTIVE chapter is Alpha (1870, reestablished 1934) at Monmouth College
Newest is Eta Iota at Creighton University (2005)
ZETA TAU ALPHA
235 chapters
144 Active chapters
61.27% of all chapters are currently active!
Oldest active chapter: ALPHA chapter (1898) at Longwood University at Farmville, VA
Newest chapter: KAPPA UPSILON chapter (2004) Georgia College and State University
COLONIES: Christopher Newport University, Kappa Phi
Recolonization: Duke University, PHI Chapter
Thanks to EtaPhiZTA for this info!
ALPHA DELTA PI
192 chapters
131 Active Chapters
67% of total chapters up & running
Oldest active chapter: Delta (1905) at the University of Texas
Newest chapter: Eta Omega (2000) at Centre College in Kentucky
KAPPA DELTA
??? chapters
122 Active Chapters
??? %
Oldest active chapter: Epsilon at Louisiana State University
Newest chapter: ???
PHI MU
??? Chapters
120 Active Chapters
??? %
Oldest active chapter: Epsilon at Millsaps University
Newest chapter: ???
ALPHA CHI OMEGA
176 Chapters
132 Active Chapters
75 % of chapters still in existance
Oldest active chapter: Alpha at DePauw University
Newest active chapter: Iota Omega at Carthage College
ALPHA GAMMA DELTA
??? Chapters
112 Active Chapters
??? %
Oldest active Chapter: Delta at University of Minnesota
Newest active Chapter: Kappa Gamma at Texas A & M
SIGMA SIGMA SIGMA
172 Chapters
106 Active Chapters
61% of chapters up & running
Oldest active Chapter: Alpha at Longwood College
Newest active chapter: Metro State College of Denver (CO)
Colonies- as of fall 2004-
Armstrong Altantic State Univ. (GA)
Culver- Stockton College (MO)
Embry-Riddle Aeronautical Univ. (FL)
Pi Beta Phi
Total chapters 167
Total Active chapters 134
80% of chapters still active
Oldest Chapter: IL Alpha, Monmonth College 1867
Newest Active Chapter: CO Epsilon, University of Colorado, (2002)
Colony: NC Delta, NC State Univ. Fall 2004
GAMMA PHI BETA
Total Chapters 162
Total Active Chapters 116
Percent of Chapters Still Active=71.6% (wish it were higher!)
Oldest Chapter= Alpha, Syracuse Univ., 1874
Newest Chapter=Zeta Sigma, University of South Carolina
ALPHA PHI
Over 200 chartered chapters
144 Active Chapters*
Oldest existing ACTIVE chapter is Alpha chapter (1872) at Syracuse University
Newest chapters –
Iota Iota at George Washington University
Rechartering of Lake Forest College - Gamma Epsilon deuteron
* does not include scheduled recolonizing of Phi chapter in fall 2006
PLEASE let me know of any corrections. In the meantime, I'll try to find other GLO's to post.