code: def forward(self, wgf_u, wgr_x, wf_u, wr_x):
      G_first_term = self.BN_gfu(wgf_u)
      G_second_term = self.BN_grx(wgr_x)
      G = F.sigmoid(G_first_term + G_second_term)
  
      x_first_term = self.BN_fu(wf_u)
      x_second_term = self.BN_Gx(self.BN_rx(wr_x) * G)
      x = F.relu(x_first_term + x_second_term)
  
      return x
  
imports: import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the GRCL_unit obj's underlying member method code with example usage: obj.forward(wgf_u, wgr_x, wf_u, wr_x) and returns: x