Import issue in GTS

Dear Experts

1.does the  GTS waybill is same as GTS cutoms bill of lading?

I heard this two terminology many times, and get confused.

2.if we want to maintain import B/L lading information in system. for gross weight,qty check between inbound delivery and B/L

Can we maintain the B/L use GTS customs bill of  lading, and use BW report for check.

Now  our solutin is customized B/L  object in ECC,

which is the standard way?

3.Can block the inbound delivery into GTS. only after the gross weight and qty matched  with B/L information?

thanks in advance!