  We report our photometric and spectroscopic follow-up observations of the
superoutbursts of three dwarf novae (GWAC\,180415A, GWAC\,181017A and
GWAC\,181211A) identified independently by the Ground Wide-angle Cameras
system, one of the ground-based instruments of the China-France SVOM mission.
Based on a combination of our photometry and that taken from the AAVSO, our
period analysis of the superhumps enables us to determine the mass ratios to be
0.0967-0.1163, 0.1879-0.1883 and 0.0981-0.1173 for GWAC\,180415A, GWAC\,181017A
and GWAC\,181211A, respectively. GWAC\,180415A can be firmly identified as a WZ
sge-type dwarf novae due to its long duration ($\sim2$ weeks) multiple
rebrightenings with amplitudes of 3-4 magnitudes, the early superhump
associated with a double-wave modulation and the low mass ratio. The inferred
low mass ratio and location in the $\varepsilon-P_{\mathrm{orb}}$ diagram
suggest that GWAC\,181211A is a WZ sge-type dwarf novae candidate. The measured
Balmer decrements suggest the Balmer line emission is produced from an optical
thick region in GWAC\,180415A and GWAC\,181017A, and from an optical thin
region in GWAC\,181211A.
