Introduction: If all values from the page multiday summary are to be exported via gdt is determined via the "multiday" setting in the report.
Possible since 4.6.6 and 5.1 via DC-2424

Settings:

• Set "Build multiday result text" (3) via "holter" Settings (1) "Menu/Functions", (2) "Processing"
  

• set "multiday on" in the report see: