Inside of Greater Boston, WGBH used station branding and was famously known as GBH 2 until 2010 when the WGBH corporate branding was implemented into the station branding.
Logos
1974–2020
Outlined version
Blue version
Blue/green version
Dark blue version
"WGBH Boston" television tube logo, used on the packaging of Vestron Video releases of WGBH programs
White TV tube logo
Outlined TV tube logo
Print TV tube version
Outline print TV tube version
Secondary logo (used inside Greater Boston and station branding)
Secondary Blue/green logo 
Outlined secondary logo
Secondary logo (with station branding)
Logo as 'GBH2 (1994-2009)
Logo used only for TV listings (1994-2001)
Logo used for listings on Channels 2 and 44 (1994-2001)
Secondary logo (2010-2020)
Logo as GBH
Logo as GBH 2
2006 screen bug (orange)
2006 screen bug (purple)
Orange neon logo, used on-screen
2020-present
Secondary logo (2020-present)
ID's
1955–1956
1956–1971
1971–1977
B&W #1
B&W #2
B&W #3
Brown & beige version #1
Brown & beige version #2
Brown & beige version #3
The French Chef #1
The French Chef #2
The French Chef #3
Evening at Pops #1
Evening at Pops #2
Evening at Pops #3
1977–2020
1977–1993
1993–2009
1993 version
2001 version
2001 HD version
Arthur (1996)
Station ID (2000)
Station ID (2001)
The channel's GBH on-screen bug that was used during PBS Kids (1999-Early 2000's)
2008–2020
2008 enhanced HD version of the logo, without "Boston"
Greater Boston (2014)
1973-1979
1979–1982
1983–1989
Logo superimposed over Boston cityscape
Orange “2” logo
Christmas ID
1986–1989
1989–1994
WGBH 2 Station Id From 1990
WGBH 2 Station Id From 1992
WGBH "2-Town" Id From 1993 (Version 1)
WGBH "2-Town" Id From 1993 (Version 2)
WGBH 2 "PTV" Id From Monday July 11, 1994
WGBH 2 "PTV" Id From Fall 1994
_1994.png "WGBH-TV 2 PBS (PTV) 1994.png (1.59 MB)")
WGBH 2 "PTV" Id From Mid 1994
1991–1996
This version of the logo is exclusive to the two Carmen Sandiego TV series and is identical to that of the version used for WQED-TV
2001–2013
2013–2020
2020–present
In-credit versions
1974–2020
Nova (1974)
A Woman's Place In The House: A Portrait of Elaine Noble (1975)
.png "WGBH (1976).png (364 KB)")
Videos
WGBH Boston (Video of 1977 Logo)
2001 WGBH Station ID