A precise measurement of Cabibbo-Kobayashi-Maskawa unitarity triangle angle $\gamma$ is crucial for testing the Standard Model description of $CP$ violation and probing for new physics effects. The precision can be improved by exploring new $B$ and $D$ decay modes. Measurements of $\gamma$ are statistically limited and hence obtaining $D$ decay parameters from $B$ decay data leads to further loss in precision. So, external inputs are crucial, especially in multibody $D$ decays. They are measured at BESIII due to the lack of quantum correlated $D$ meson data at the $B$ decay
experiments. $\gamma$ measurements at LHCb and Belle(II) which include the $D$ decay input from BESIII are presented.