What are the tables involved in the Transfer to GL and GL posting?

Subledger Tables 
XLA_AE_HEADERS 
XLA_AE_LINES 
XLA_DISTRIBUTION_LINKS 

a) Transfer Journal Entries to GL (XLAGLTRN) process takes the subledger journals and inserts records into the Interface Tables 

Interface Tables 
GL_INTERFACE / XLA_GLT_<groupid> 

b) Journal Import (GLLEZL) then reads from the interface table and creates records in the GL Tables 

GL Tables 
GL_JE_BATCHES 
GL_JE_HEADERS 
GL_JE_LINES 
GL_IMPORT_REFERENCES 

c) GL Posting process then posts to the GL_BALANCES table. 

Ref: Doc ID 876190.1