1. The problem asks to complete the congruence statement between triangles $\triangle GHI$ and $\triangle MNL$.\n\n2. Given the markings: \n- In $\triangle GHI$, angle $G$ has a double-arc, angle $H$ is a right angle, and angle $I$ has a single-arc.\n- Side $GH$ has one tick, side $HI$ has two ticks, and side $GI$ has three ticks.\n\n3. In $\triangle MNL$, angle $M$ is a right angle, angle $L$ has a double-arc, and angle $N$ has a single-arc.\n- Side $LM$ has one tick, side $MN$ has two ticks, and side $LN$ has three ticks.\n\n4. To complete the congruence statement, we match corresponding vertices by their angles and sides:\n- Angle $G$ (double-arc) corresponds to angle $L$ (double-arc).\n- Angle $H$ (right angle) corresponds to angle $M$ (right angle).\n- Angle $I$ (single-arc) corresponds to angle $N$ (single-arc).\n\n5. Therefore, the congruence statement is:\n\n$$\triangle GHI \cong \triangle L M N$$\n\n6. Note that the order of vertices in the congruence statement must preserve the correspondence of angles and sides, so $G \to L$, $H \to M$, and $I \to N$.