OasisR package - Gorard index applied by subgroup

Question

I'm doing an academic research about segregation in peruvian education. I'm trying to calculate Gorard Index from OasisR, but I want it for every district in the country. I have a table with the number of students of each socioeconomic quartile of every institution, but I'm failing to group it by the district geographical code. As I'm really a noob in R (I've done some courses but I feel this is so hard compared with the introduction courses) I would like to ask for your help.

Columns to perform Gorard Index: Q1, Q2, Q3, Q4 Column to group by: Codgeo.

I've tried to do it by grouping or arranging, but I always get these errors.

> Gorard(Datos_muestrales_UBIGEO[,5:8]) %>%
+     arrange(Datos_muestrales_UBIGEO,Codgeo, .by_group = TRUE)
Error in UseMethod("arrange_") : 
  no applicable method for 'arrange_' applied to an object of class "c('double', 'numeric')"

> Gorard(Datos_muestrales_UBIGEO[,5:8]) %>%
+     group_by(Codgeo)
Error in UseMethod("group_by_") : 
  no applicable method for 'group_by_' applied to an object of class "c('double', 'numeric')"

Dataset can be found here

Thank you in advance.