The actual GT5 exam comprises three sub tests:

Raven Test: spatial reasoning (36 items in 40 min), only covered in class, not in the workbook
Reading Comprehension: reading comprehension(30 questions in 40 min)
Qunantitative comparison: Mathematical reasoning (50 items in 20 min)

The actual GT3 test comprises:
Math 52 questions (48 std)
Verbal 64 questions (55 std)
Raven 60 questions (50 std)

The prep package of workbooks
math bundle (36 booklets)
reading/vocab/verbal bundle (36 bundles)
grammar bundle (36 bundles)

Each booklet has a collection of more than 100 simulated questions for pactice.