Try:

HoldForm[MeijerG[{{1, 1}, {}}, {{1}, {0}}, x]] // TraditionalForm

MeijerG[{{1, 1}, {}}, {{1}, {0}}, x]
(*Log[1 + x]*)

MeijerGReduce[Log[1 + x], x]
(*Inactive[MeijerG][{{1, 1}, {}}, {{1}, {0}}, x]*)

If you have it written in Latex we can extract to MMA Input form:

  HoldForm[\!\(\*
  TagBox[
  RowBox[{"MeijerG", "[", 
  RowBox[{
  RowBox[{"{", 
  RowBox[{
  RowBox[{"{", 
  RowBox[{"1", ",", "1"}], "}"}], ",", 
  RowBox[{"{", "}"}]}], "}"}], ",", 
  RowBox[{"{", 
  RowBox[{
  RowBox[{"{", "1", "}"}], ",", 
  RowBox[{"{", "0", "}"}]}], "}"}], ",", "x"}], "]"}],
  HoldForm]\)] // TeXForm
 (ToExpression[%, TeXForm] // Quiet)[[1]]