Property gift to child who assumes the mortgage

If I make a gift of real estate to my child, who assumes the outstanding mortgage, which values do I use on form 709? Also, the value has increased since I purchased; will I need a Schedule D for capital gains, and which values do I use there?

 

More details: the title transfers to my child; I remain as a guarantor on the mortgage where my child is the primary mortgage holder.

 

E.g.:

My cost basis = 1,000,000

Outstanding mortgage = 700,000

FMV = 1,200,000

 

Thanks you.