Personally, I don't have enough information yet to offer help.
Perhaps you could show us a transcript of your session with the commands you gave and the errors you observed.
Or perhaps you could try to imitate the commands in the makefiles in lib/ gsi/ and gsc/ to make
find . -name '*.a' ./gsi/libgambitgsi.a ./gsc/libgambitgsc.a ./lib/libgambit.a
after following the build instructions on github:
https://github.com/feeley/gambit
Brad