If the loan is for construction only - and we do not intend to do the permanent loan - we would not need an application and we would not collect GMI.
That is correct. See the Commentary to 202.13(a)(3) and (5).
purchase land & take out leter--GFE, yes---Early TIL no
The loan is subject to RESPA because of the transfer of title to the first user; and a construction loan meets the definition of a residential mortgage transaction, therefore you have a RMT subject to RESPA. The ETIL would be required under 226.19(a).