Siemens BQ ground fault circuit breaker
Siemens (ITE) no-longer makes a GFCI in the BQ series of breakers.
Some panels that take BQ breakers also accept type QP-push in breakers, which does still have a GFCI option available. Please check your panel label for list of breakers it accepts.
Obsolete GFCI: BF1B015, BF1B020, BF1B030, BF2B015, BF2B020, BF2B030, BF2B040, BF2B050
Possible GFCI option: QF115, QF120, QF130, QF215, QF220, QF230, QF240, QF250A, QF260A