Generated in vivo from P{3'TV2-GMR.96C}, using P1cre recombinase. Consists of 3' P end, a loxP site, an Hsp70 core promoter, the GFP coding sequence, an FRT site, a duplicated portion of the w marker. This "enhancerless" GFP transgene can be combined with the "promoterless" GFP transgene P{3'TV2-GMR.96C.-FRT} to assess GMR activity in trans.