To see if gojq works even with complex jq programs, I tested it on my wsjq[0] Whitespace language interpreter, which uses most of the advanced jq features. It impressively appears to support the full jq language, though I uncovered a bug[1] in gojq.
gojq's arbitrary-precision integer support will be useful (jq just uses 64-bit floating-point), though I suspect it will have performance regressions, since it uses math/big, instead of GMP.