1 NYSE: GSSTSX: GSC

Wassa Underground: Isometric View

19500N

19300N

19100N

18900N

400 m

24217DD006

BS17-720-29

BS17DD385D3

BS17DD385D2

BS17DD308MBS17DD385D4

BS17DD315M

BSDD347

BSDD351

BS17DD014A

BS17DD012

BS17DD003

Decline as at Dec 31,

2017

B Shoot stopes

Wassa Main Pit as at Dec 31,

2017

Grade Block model >1.9 g/t

Inferred Mineral

Resource

N S

Mother hole

BS17DD385M

4 daughter holes

BS17-745-17

2 NYSE: GSSTSX: GSC

Wassa Underground: Plan View

B Shoot stopes

F Shoot stopes

Decline

19500N

19300N

19100N

18900N

F Shoot expected projection

B Shoot expected projection

Inferred Mineral Resource

200m

N

3 NYSE: GSSTSX: GSC

B Shoot South Drilling: 19500 N

19500 N

• Two holes, BSDD347 and BSDD351, are existing holesthat were re-entered with a diamond drill rig and theholes extended

• These two holes were targeting the F Shoot, which wasthought to project into the footwall of the B Shoot

• Both of these holes intersected dioritic intrusive rocks,where the F Shoot was interpreted to be

• Further geological work is needed to determine thegeometry of these intrusive bodies

BSDD34722.6m @ 4.2g/t

BSDD290BD125.4m@8.3g/t

19500 N

B Shoot

BSDD347No significant intersections

BSDD351Assays Pending

W E

BSDD290B19.0m@6.9 g/t

4 NYSE: GSSTSX: GSC

B Shoot South Drilling: 19300 N

19300 N

• Drilling on this section was targeting the F Shootprojection in the footwall of the B shoot zone

• One new hole, BS17DD386M, and one historicdeepened hole, BSDD308M, were drilled ~300 m apartto test the F Shoot structure. Both holes intersectedwhat is interpreted to be the target

• Additional drilling is planned for 2018 to test betweenthese two intersections

BSDD308M23.7m @9.6g/t

BSDD308D113.4m @ 6.0g/t

BSDD295M26.3m@2.9g/t

Planned hole

19300N

BSDD308M7.4 m @3.1 g/t

BS17DD386M6.4 m @ 3.2 g/t

B Shoot

W E

5 NYSE: GSSTSX: GSC

B Shoot South Drilling: 19100N

BSDD315M70.5m @ 5.9g/t

BSDD315M60.1m @ 3.4g/t

19100 N

• One hole was drilled ~285m up dip of the previoushigh grade intersection in historic hole BSDD315M

• Hole BS17DD389M was drilled to test the zone~85m above hole BSDD315M – results are pending

• Two additional daughter holes are planned to testdown dip of hole BSDD315M

Planned hole

BS17DD389MAssays Pending

19100N

BS17DD387M6.6 m @ 1.1 g/t

W E

6 NYSE: GSSTSX: GSC

B Shoot South Drilling: 18900 N

BS17DD386M23.8m @6.1g/t21.7m @ 5.3g/t

BS17DD386D24.3m@25.9g/t

BS17DD386D115.9m @4.3g/t

Planned holes

BS17DD386D35.0m @ 5.5g/t

B Shoot

F Shoot

18900N

BS17DD386D315.0m @ 3.8 g/t8.1m @ 3.6 g/t

BS17DD386D394m@4.3 g/t

Currently Drilling

BS17DD386D47.7m@5.2g/t

18900 N

• Five holes drilled on the southern moststep out fence, testing F Shootmineralization

• Currently drilling is underway to test BShoot horizon and F Shoot at depth

• Hole BSDD386D3 intersected widestzone of +4 g/t Au mineralization todate on Wassa Property

W E

7 NYSE: GSSTSX: GSC

242 Section FW

24217DD0066.8m @ 8.2g/t

WUG Pan 1 Stopes

• 242 FW target discovered in 2017 – new footwall horizon

• Located in western limb of Wassa deposit scale fold structure

• Drilling planned for 2018 to test this zone further

Planned DD holes

Wassa Underground

Wassa Plan View

Drill Section 8900 WE

N S