Linear or logistic scale of the fixed effect

Hello,

I am using --reml-est-fix combined with --reml to estimate fixed effect in a model with GRM fitted as random effect. In the output file I've got estimate and se for each of the fixed effect. My trait is a binary trait, so I am wondering that on which scale the reported effect size and se is? Is it on the linear scale or having been transformed  into logistic scale(so it is comparable with the effect size estimated from logistic regression)?

Thanks

Best wishes,

Asling