There are 7 Gates Learjet 55C aircraft on the U.S. registry that TailWiki has a page for. Every one is built from the public FAA record — year, serial, engine, home base, and registration history — and owners and pilots add photos, trips, and stories on top. The ones listed here were built between 1979 and 1990.
N322GC
1990 Gates Learjet Corp 55C
Fort Wayne, IN
N559RA
1990 Gates Learjet Corp 55C
Waterford, MI
N263MS
1989 Gates Learjet Corp 55C
Jacksonville, FL
N552TL
1989 Gates Learjet Corp 55C
Lititz, PA
N518SB
1979 Gates Learjet Corp 55C
Hopkins, MN
N143LJ
Gates Learjet Corp 55C
Greer, SC
N178AM
Gates Learjet Corp 55C
North Salt Lake, UT