Locating Indels In Gene

I have a excel file from windows (spreadsheet) contains start, end and indel sequences (-GGC means GGC deletion or +AAC means AAC insertion) in column 1, 2 and 3 respectively. I have a reference genome in both fasta format and EMBL format (annotated). How can I locate my indels in the genome based on reference? I want to find where eaxctly my indels are (e.g. in which gene or intergenic regions?)

e.g. my file

Start       End      Indel_Description
  12        20        +GCCGCAC
  45        46        -C