The drilling will test targets at Firetower and Firetower East outlined by a three-dimensional induced polarisation (3DIP) survey done last year.
Greatland said the survey highlighted a large chargeability anomaly, about 1,000m long, traversing east-west across the Firetower prospect and open to the east and at depth.
The survey also showed the existing sub-surface gold mineralisation identified in drilling to date at Firetower was spatially associated with the 3DIP chargeability anomaly.
The main aim of the drill programme is to test strike continuity at the Firtower prospect and potential depth extensions of mineralisation and test 3DIP chargeability anomaly along strike from the prospect in a previously undrilled area.
Greatland also wants to test the centre of the chargeability anomaly at Firetower around 150m below surface through systematic, grid-based drilling.
Fifteen holes drilled on five north-south traverses, 75-250m deep, are expected to result in more than 2,000m of drilling.
The company expects to start field activities in late May after it receives all required regulatory approvals.
CEO Gervaise Heddle said the drill programme was designed to further advance Firetower and was an "important opportunity not only to test the continuity and depth of mineralisation at Firetower itself, but also to drill an area to the east not previously drill tested, where last year's 3DIP survey outlined a large chargeability anomaly".
"This will determine whether the spatial association between the chargeability anomaly (as identified by 3DIP) and mineralisation continues as we step out along strike," he said.
At the current 1.72p (US2.25c), Greatland's shares (AIM:GGP) have risen 56% in the past six months.